Excerpts from an article at The Independent:
Blackflies are being blamed for an upsurge in the number of people experiencing severe reactions after being bitten by insects. In some cases, victims have suffered grotesquely swollen limbs, requiring hospital treatment with intravenous antibiotics...Personally I've always dreaded deerflies more than blackflies. No post about blackflies would be complete without including a video of the famous Canadian folk song by Wade Hemsworth, based on his true-life personal experience. The lyrics are in the pulldown at the YouTube link.
The insects are a major nuisance in North America as they are a scourge to livestock, and many states operate control programmes based on spraying pesticides. In Africa, the insect plays a key role in the transmission of the parasite that causes river blindness...
Stuart Hine, an entomologist at the Natural History Museum, said: "Blackflies are quite pernicious. Their mouth parts are scissor-like and they lacerate the skin and then suck the blood. They inject an anaesthetic so after the initial bite you can't feel it. When you scratch it and germs get in, then you can get a serious infection...
"By lunchtime, my leg was so swollen, an occupational health nurse feared I had deep-vein thrombosis and sent me to an accident and emergency ward. I was limping heavily and my leg was getting bigger by the hour... The next day when I returned to A&E my leg was too big to pull up my trousers..."
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